I know this would be a nightmare to code, because gravity guns enable manipulation of physics, and that often leaves to bugs and all kind of annoying things to fix. Although this game had some bugs like being able to push yourself with objects, jump with pulled objects, I had quite a bit of fun trying to bug myself into a wall, and trying to see what objects are best for infinity jumping hack XD. Might not be your intention but had fun when playing your game :D
yup, definitely something I had in mind, and I actually removed collisions with the player colliders while grabbing an object during one of the iterations of development, but at some point changes to collision layers reintroduced the ability to collide with grabbed objects and it never got fixed.
I'm glad it made for some fun trying to break the game and I definitely used the glitch as a fun way to try and float around and levitate my way through the harder parts of the game!